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An efficient and magnetically recoverable g-C3N4/ZnS/CoFe2O4 nanocomposite for sustainable photodegradation of organic dye under UV–visible light illumination
Environmental Research ( IF 8.3 ) Pub Date : 2021-06-17 , DOI: 10.1016/j.envres.2021.111429
G Palanisamy 1 , Nora Hamad Al-Shaalan 2 , K Bhuvaneswari 1 , G Bharathi 3 , G Bharath 4 , T Pazhanivel 1 , Sathishkumar V E 5 , Madan Kumar Arumugam 6 , S K Khadeer Pasha 7 , Mohamed A Habila 8 , Adel El-Marghany 8
Affiliation  

Effective improvement of an easily recoverable photocatalyst is equally vital to its photocatalytic performance from a practical application view. The magnetically recoverable process is one of the easiest ways, provided the photocatalyst is magnetically strong enough to respond to an external magnetic field. Herein, we prepared graphitic carbon nitride nanosheet (g-C3N4), and ZnS quantum dots (QDs) supported ferromagnetic CoFe2O4 nanoparticles (NPs) as the gC3N4/ZnS/CoFe2O4 nanohybrid photocatalyst by a wet-impregnation method. The loading of CoFe2O4 NPs in the g-C3N4/ZnS nanohybrid resulted in extended visible light absorption. The ferromagnetic g-C3N4/ZnS/CoFe2O4 nanohybrid exhibited better visible-light-active photocatalytic performance (97.11%) against methylene blue (MB) dye, and it was easily separable from the aqueous solution by an external bar magnet. The g-C3N4/ZnS/CoFe2O4 nanohybrid displayed excellent photostability and reusability after five consecutive cycles. The favourable band alignment and availability of a large number of active sites affected the better charge separation and enhanced photocatalytic response. The role of active species involved in the degradation of MB dye during photocatalyst by g-C3N4/ZnS/CoFe2O4 nanohybrid was also investigated. Overall, this study provides a facile method for design eco-friendly and promising g-C3N4/ZnS/CoFe2O4 nanohybrid photocatalyst as applicable in the eco-friendly dye degradation process.



中文翻译:

一种高效且磁性可恢复的 g-C3N4/ZnS/CoFe2O4 纳米复合材料,用于在紫外-可见光照射下可持续光降解有机染料

从实际应用的角度来看,有效改善易于回收的光催化剂对其光催化性能同样重要。如果光催化剂的磁性足够强以响应外部磁场,磁性可恢复过程是最简单的方法之一。在此,我们通过湿法制备了石墨氮化碳纳米片(gC 3 N 4)和 ZnS 量子点(QDs)负载的铁磁性 CoFe 2 O 4纳米颗粒(NPs)作为 gC 3 N 4 /ZnS/CoFe 2 O 4纳米杂化光催化剂。 -浸渍法。CoFe 2 O 4 NPs 在 gC 3 中的负载N 4 /ZnS 纳米杂化物导致延长的可见光吸收。铁磁性gC 3 N 4 /ZnS/CoFe 2 O 4纳米杂化物对亚甲蓝(MB)染料表现出更好的可见光活性光催化性能(97.11%),并且很容易通过外部磁棒从水溶液中分离出来。gC 3 N 4 /ZnS/CoFe 2 O 4nanohybrid 在连续五个循环后显示出优异的光稳定性和可重复使用性。大量活性位点的有利带排列和可用性影响了更好的电荷分离和增强的光催化响应。还研究了活性物质在 gC 3 N 4 /ZnS/CoFe 2 O 4纳米杂化物在光催化剂过程中降解 MB 染料的作用。总体而言,本研究为设计环保且有前景的 gC 3 N 4 /ZnS/CoFe 2 O 4纳米杂化光催化剂提供了一种简便的方法,适用于环保的染料降解过程。

更新日期:2021-06-22
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